Combined cylinder cock and relief valve



April 5, 1927.

V. P. M VOY COMBINED CYLINDER COCK AND RELIEF VALVE Filed July 5. 1920 9 Z7 u 22 Z l/ A? lt/fi- 7 F/ GQ Zn INVENTOR VmcmE/Vc/ay ATTORN EY mama" A 5, 1921.

PATENT OFFICE.

,vmcnn aucvor, or nosing, aria-imam.

comimnn cnmnna 0001: m) Bauer VALVE.

; Application 'aieam a, 1920. Serial No.'398,890.

his invention relates to certain new and useful improvements in cylinder cock and relief valve combined, having for its objects among others to provide a simple and eflicient device of this character composed of few parts, those readily assembled, capable of manufacturejat small-cost, reliable in its I action and not liable to get out of order.

A further object of' the invention isto provide a spring pressed pistol and also a spring-pressed relief valve cooperatively arranged to operate in one direction, and in the opposite direction movable independently of each other or together according to the condition of use. v

Other objects and advantages of the 1nve ntion will hereinafter appear and the novel features thereof will be particularly pointed out in the appended claims.

Theinvention, in its preferred form, is clearly illustrated in the accpmpanying drawing, which, with the numerals of refcrence marked thereon, form a part of this specification, and in which-- Figure 1 is a substantially central longitudinal section showing my present improvement applied to a cyl nder.

F'gure 2 is a similar view showing the parts in different position. i

Like numerals of reference indicate like parts throughout the different views.

Referring to the drawings,

1 designates a portion of an engine cylinder to which my present improvement is shown as applied b screwin the threaded portion 2 thereof into the ottom of the cylinder. This portion 2 extends laterally from the body portion 3 which is shown as provided with a nipple 4 screw-threaded, as shown at 5, and adapted to receive the threaded portion 6 of a cap nut 7.

8 is a bridge or partition having an aperture 9 therein for the reception of the guide member 10 projecting from the check valve 11, the barrel 12 of which is received within the bore 13 of a piston 14, which latter is adapted to reciprocate in the cylindrical portion 15 of the body 3. The end of the portion 15 is screw-threaded, as at 16, to receive the threaded portion 17 of a cap 18. The ca 18 has the opening 19 therein and with t is opening communicates the bore of the screw-threaded portion 20 with which is adapted to be connected an air pipe, not shown,-for the purpose of supplymg air to the interior of t e cylinder 15.

It is tov be understood that the air pipe is,

designed for connection with a suitable reservoir or other suitable source of supply of air under pressure and provided with a manuall operated controllingyalve, but it is not tiought necessary to show such reservoir or conncction's'between the same and the cap 18. I

lVithin the bore of the piston 14' is a spring 21, one end of which is seated against the adjacent end of the barrel 12, while 22 is a. spring disposed between the cap nut 7 and the adjacent end of the guide member 10 of the check valve, as clearly shown in both views. I

The piston 14 is guided upon the barrel 12 and, in turn, serves as a guide for the latter, the said piston being provided with a seat portion 23 adapted to be seated against a seat 24 surrounding the opening 25,v as shown.

26 is a lateral discharge outlet from the portion 27 ofthe body. i

With'the parts constructed and arranged substantially as hereinbefore described and;

connected up with the engine cylinder, as

Thown, the operation,briefly stated, is as folows:

As shown in Figure 1, the parts are in their closed position, air pressure being upon the end of the piston 14,- which latter is forced to Its seat at 24; the check valve 11 is also forced to its'seat, thespring 21, bein put'under compression of suflicient strengt l to overcome cylinder ressure under all normal conditions Un er these same conditions, with the parts in the position shown in 'Figure .1, should the engine pick up water from the boiler, or, in case of an accumulation of steam sufiicient to overcome the tension of the spring 21, the check valve 11 will be unseated and moved a ainst the tension of the spring 21, allowing t e water or steam to exhaust through the-connection 2, chamber 27 and the outlet 26-to the atmosphere, through the opening 9 in the partition 8. Any pressure over and above throttle pressure, upon the area of the check valve 11 will serve to unseat the same As soon as pressure is reduced to normal, the spring 21 forces thecheck valve again to its seat, as shown in Figure 1.

Figure 2 shows the condition and position of the parts when the air is released from the chamber back of the piston'14. When this pressure is released, the spring 22 serves to force theicheck valve and its barrel to open position, being {assisted by the pressure or condensation from the cylinder through the port 2, chamber 27, valve ort 9and outlet passa e 26. Assoon as he air pressure 14 is moved to the right in the drawing, the

spring 21 iscomp'ressed and the check valve "11 is forced to its seat, and then the seat portion 230i the piston is brought against the seat 24 soas to positively prevent leakage of air which would be detrlmental to the storage of air on the engine. which has to be conserved for, brake pressure.

It is to be understood that in the movement of the parts from the position n which they are shown in Figure 2 to that 1n .which' they are shown in Figure 1 (when air is supplied to the chamber 28 through the opening 19) the check valve ll is first forced to its seat b the spring 21, in advance of the seating of t epi ston 14 against its seat, the spring 22 being a comparatively light spring,

while the air acting upon the osltionat its a said valve, said seats being disposed between l power, the cylinder having a lateral dis 1 larger area has to compress t e sprin 21,

transmitting the load thereof to the c eck valve "a ainst its seat.

p ,Modi cations in details may resorted'to without departing from the spirit of-the in-,

vention or sacificlngiany of its advantages.

What is claimed as new is 1. A combined cylinder cock and relief valve embodying an air cylinder, a piston having a seat portion, a check valve movable to seating position by and in advance of said piston, adjacentseats for the piston and valve, and springs 'at opposite ends of the said s rings.

2. combined cylinderv cock and relief valve embodying an air cylinder, a bored piston therei'nhaving a seat portion, a check valve supported in and movable to seating position in advance of the piston, adjacent seats for the piston seat portionand the check valve, a spring acting onthepiston and valve embodying an air cylinder, a bored piston therein'havihg'a seat portion, a check valve supported 1n and movable .to seating position in advanceofthe-piston, adjacent.-

seats for the piston seat portion andthe check valve, 9. spring acting on the piston and disposed between the stem of the valve and the end wall of the bore. of the piston,

and a spring acting on the valve, to hold the same in unseated position when air pressure released from the piston, said springs actmg upon opposite ends of they check valve.

4. A combined cylinder cock and-relief valve embodying. an air chamber, a bored piston therein having a seat portion, a check;

and movable toseating POSllZlOIl in advance of the piston, adjacent valve supported in seats for the piston seat portion and the check valve, a spring acting on the piston and disposed between the stem of the valve and the end wall ofthe bore of the piston, and a spring acting on the valve to hold the same in unseated osition when air pressure is releasedfrom tiie piston, being of different power. 7 5. A combinedcylinder cock and relief valve comprising a body portion with a bridge having an opening therethrough and a seat for a piston, arelief valve, an air cylinder, a bored piston in said cylinder adapted to cooperate with said seat to prethe said springs vent leakage of air, a spring in the piston acting on one end of the valve, and a springacting on the opposite end of the valve, one of the springs being seated in the bore of e piston and said springs being of different 1 VINCEN P. McVOY.- 

